Leather-punching machine.



Patented lan. 2, |900.

C. P. STANBN.

LEATHER PU NCHING MACHINE.

(Application led Mar. 10` 1898.)

n TN f f.,

x www No. 640,426. Patented Jan. 2, |900. C. P. STANBON.

LEATHER PUNCHING MACHINE.

(Application Ied Mar. 10, 1898.) (No Mode.) 3 Sheets-Sheet 2.

ma Norms uns no, Puo'mmmo, wAsmNoToN. n c.

No. Mll-26. Patented 1an. 2, |900.

C. P. STANBN. LEATHER PUNCHING MACHINE.

(Application filed Mar. 10, 1898.) (No Windel.)

3 Sheets-Sheet 3.

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rvrrien hrrrrne nrnn'r @risica (.llARLES P. STANBON, OF LYNN, MASSACHUSE'VIS.

LlEAl'llEH-PUNCHING illliCl-HNE.

SPECIFICATION forming part of Letters Patent No. 640,426, dated January 2, 1900. Application filed March lO, 1898. Serial No. 673,387. (No model.)

To @ZZ 107mm it 1n/(ty concern.-

Be it known that I, CHARLES P. S'rnNBoN, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Leather-Punching Machines; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertaius to make and use the same.

The present invention relates to machines for perforating or ornamenting the parts of boots and shoes-such as tips, Vamps, quar ters, tbeand it particularly relates to certain improvements of the punching and feeding mechanism of the machine disclosed in Letters Patent of the United States issued to Benjamin F. Hall, No. 535,898,011 the 22d day of November, 18d-l.

The object of the present invention is to iinprove the feeding mechanism to insure a correct and uniform feeding of the work beneath the punch and to improve the operation of the machine in other particulars, which will be hereinafter noted.

To the above end the present invention consists of the devices and combination of devices which will be hereinafter described and then particularly pointed out in the claims.

The present invention is illustrated in the accompanying drawings, in which- Figure l represents the machine in side elevation looking at the left side thereof. Fig. 2 is a top plan view of the machine. Fig. 3 is a side elevation opposite to that shown in Fig. l. Fig. l is a front elevation of the machine. Fig. 5 is a fragmentary view of details of construction, parts being in vertical section. Fig. (i is a vertical section upon the dotted line shown in Fig. l looking in the direction of the arrow. Fig. 7 shows a detail of the bed of the machine and showing the construction of the lower feed-plate.

Similar letters of reference refer to correspending parts throughout the several views.

ln the drawings, A represents a frame of suitable size and shape to support the working parts, such frame comprising a base a, supported by suitable legs or standards a',

whereby the machine may be secured in suit able position upon a work bench or table in convenient position for the operator.

Rising from the base a is the main frame u2, which is cut away, as shown at a3, forming a modified gooseneck construction, and at its upper part it is also cut away, as shown at a4, forming the projections a5 and a6. The upper portion of the frame a2 is also cut out, as shown at al, for a purpose to be hereinafter described. Arranged in suitable bearings a? in the frame ai is the power-shaft B, which at its rear end, outside of the bearing as, is provided with a suitable stepped pulley l and a connected l1andwheell), by which power is communicated to the shaft B by a belt from any suitable source of power or by means of which the shaft ll may be turned by the opcrater.

ln suitable bearings a9, formed in the forwardly-projected portions a5 and ab' of the frame a2, is arranged for vertical reciproca-- tion a punch-stock C, carrying at its lower end anysuitable construction of punch c, arranged to punch holes in the work as it is fed beneath the same.

The punch-stock C is given a rapid vertical reciprocating movement in the bearings d by means of alink o', which at its upper end is connected to a stud c2, projecting from a c0llar c3, embracing the punch-stock C, and at its lower end provided with an eecentric-strap c", embracing an eccentric c5, carried by the forward end of the powershaft B.

The material to be ornamented is supported by a suitable work-plate D, which is formed ef suitable size and shape to support thematerial and which is secured in position upon the lower part of the frame a2 in the cut-out portion a3 by means of screws d, tapped into bosses CZ, or in any other suitable ina-nner.

It is desirable in machines of this type to adjust the stroke of the punch-stock so that the punch carried thereby will have sufficient movement to entirely pass through the matc- -rial supported upon the bed-plate in order to completely and entirely sever the piece punched from said material and at the same time to so regulate the stroke of the punchstock that the cutting' edge of the punch will.

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not have a too violent contact with the punching plate or bed, which would tend to injure and destroyits cutting edge.

In order to regulate the stroke of the punchstock in the machine of the drawings, I have arranged the collar c3 to be adjustable upon the punch-stock C, and I have provided a novel adjusting mechanism whereby the position of the collar c3 may be accurately and quickly adjusted relatively to the punch-- stock O, and thereby regulate to a nicety the stroke of the punch c.

The adjusting mechanism of'the machine of the drawings comprises a wedge c6,which is arranged to have a transverse lateral movement in a recess c7, formed in the punchstock C, the lower end of the collar c3 resting upon the inclined surface of the wedge c6, as clearly shown in Figs. 4 and ofthe drawings. The wedge o6 is moved to adjust the collar c3 by means of a screw cs, tapped into a threaded aperture in the punch-stock C and having at or near its outer end a groove a9, embraced by a forked arm 010 on the outer end of the wedge c6. The collar c3 is heldin engagement with the inclined surface of the wedge c by means of a pin c, arranged in a slot cl2, formed in the upper end of the punch-stock C above the collar c3, the outer ends of the pin c11 engaging the upper end of the collar c3, and said pin c11 is acted on by a suitable spring cl3, which lis arranged in a vertical aperture c14 in the punch-stock C, the upper end of which spring is acted upon by a set-screw C15, as clearly shown in Fig. 5 of the drawings. The screw o8 has a suitably-milled head o16, whereby it may be turned to cause the wedge to move along beneath fthe sleeve c3 and by means of which said sleeve c3 may be raised or lowered upon the punch-stock C,and thereby adjust the connection of the punch-stock C and its actuating mechanism, whereby the movement of the punch ctoward the bed-plate d may be accurately adjusted.

In order to insure the accurate feeding of the material being operated upon beneath the punch,the machine of the drawings comprises What I have termed a feeding presser-foot and also a coperating feeding dog, the presser-footand feeding-dog being arranged upon opposite sides of the material and having a relative movement toward and from each other to grip the material therebetween and also having a simultaneous lateral movement whereby both surfaces between which the work is held move to feed the work. In the present construction the presser-foot and the feeding-dog move laterally in a horizontal plane, whereby they are held in engagement with the work during the entire lateral movement of the feeding stroke, and thereby Figs. l and 3 of the drawings, and at its lower end is flared or broadened out, as shown in Fig. 4, whereby it engages a considerable portion of the material being operated upon.

The presser-foot E is provided with a shank e, which extends into a tubular bearing e', and in order that it may be yieldingly forced toward the feeding-dog, to be described, it is provided with a shoulder e2, against which actsacoilcd spring e3, loca-ted within the bearinge', surrounding the shank e, the upper end of spring c3 being acted upon by a tubular threaded screw e4, by means of which the tension of the spring e3 may be readily adjusted. The bearing e is formed upon a slide e5, in which is formed a dovetailed guideway e, said guideway embracing a dovetailed guide e7, formed integrally with or ixedly secured to the extreme outer end of the projection d6 of the frame a2. The feed-dog F consists of a small block having a serrated upper edgef and a downwardly-projecting shank f', the said shank f being received in a recess f2 in a slidefa, the slide f3 having upon its rear face a dovetailed guidewayfl, embracing a dovetailed guide f5, formed on the front of the frame 0,2 below the table or work-plate D.

The table or work-plate D is provided with a slot d2, extending transversely across the same or in the direction of the feed of the work, and the serrated upper edge of the feeddog F is positioned in said slot to have a lateral movement along the same, with its serrated edge preferably lying in the plane of the upper surface of the work-plate D, the said feed-dog being adjustably secured by means of a set-screw f6, which is tapped into a threaded aperture in the slide f3 and engages'the shank f2 of the feed-dog F.

It is desirable that the presser-foot E and the feed-dog F move laterally simultaneously, and to secure such an operation of the presserfoot and feed-dog -I have arranged a single mechanism to simultaneously reciprocate the slides e5 and f3. This mechanism consists of a lever G, which has three arms g, g', and g2 and which is fulcru med by means of the studs g3 in xed bearings g4, projecting from the left-hand side of the frame a2. The arm gis pivotally connected at g5 to a short link gG, which in turn is pivotally connected at Q7 to suitable lugs g8 on the front of the slide e5, and the arm g of the lever G is pivotally connected at gf to a jointed link gw, which in turn is pivotally connected to lugs gm, formed on the face of the slide f3. The lever G is swung on its ful'crum to impart lateral reciprocations to the slides e5 and f3 by means of a lever H, whichvis f ulcruined at h in a bracket h', projecting from the side of the frame a2, and which is provided with a slot h2, through which passes a set-screw h3, which set-screw at rits lower end carries a swiveling block h4, arranged to be adjusted along a groove h5, formed in the upper surface of the arm g2 of the lever G.

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The lever Il is actuated to swing the lever G by means of a linl; 7i, which is pivotally connected at 7LT to the free end of the lever II and which at its opposite end is provided with an enlarged collar hg, embracing the shaft B in the eut-out portion a' of the frame, between the oppositely-plaeed cams 709 and 7am, engaging cam-rolls 7L11 and 7L@ upon opposite sides of the collar hs, whereby the lever II is positively moved in both directions and imparts a positive movement to the lever G and through lever G to the slides e and f3, carrying the presser-foot E and the feed-dog F.

Itis desirable that the presser-foot E be raised against the tension of the spring ci af ter it has completed its feed movement in order to disengage the presser-foot from the work to release the work before the presserfoot E and the feed-dog F begin their movement in the opposite direction to again engage the work preparatory to feeding` it another step. In the machine of the drawings the lifting of the presser-foot is accomplished by means of a lever e', which is located in a recess fi in the slide ci in position to engage a projection or stud (not shown) on the shank e of the presser-foot It. The lever i is fixedly secured to a rock-shaft 2, which is arranged in suitable bearings ii", the forward end of the rock-shaft projecting into the recess of the slide Fixedly secured to the rear end of the rock-shaft 2 is an arm fi, which is arranged to be acted upon on each rotation of the shaft B by a finger t5, projecting from a collar i, iixedly secured to the shaft B.

The spring e is sufficient to force the presser-foot E in contact with the feed-dog l and hold the arm 'if in position to be engaged by the iinger 5, which acts on said arm to raise the presser-foot and to return the presser-foot, rock-shaft, and arm to their normal positions to be again operated by the iinger "L5 upon the revolution of the shaft B.

In the operation of this machine after a piece of worl; has been completed, in order to remove the work, if the revolutions of the shaft I3 have not been stopped in such position that the punch c is elevated from the material, it is customary for the operator to raise the punch-stoel; and punch by turning the shaft B by means of the hand-wheel b, and in the machine as heretofore constructed he would at the same time with his other hand lift the feed-point against the tension of its spring. Inasmuch as both hands of the operator were thus engaged in manipulating parts of the machine, it necessarily required him to lese control of the work, which was left free upon the work-plate, and in order to remove the work. he would have to let go of the hand-wheel after raising the punch from the work. In other words, he would have to position the shaft with one hand and after having positioned it to raise the punch, release said shaft, grasp the work, and raise the presser-foot, which required quite a little time and was generally a clumsy and unhandy arrangement.

In the present invention I have provided a presser-foot-lifting mechanism so arranged that the operator can actuate the same to lift the presser-foot with the same hand and at the same time that he grasps the hand-wheel for the purpose of turning the shaft to raise the punch, leaving his other hand free to remove and renew the work. For the purpose of securing the above-suggested result the machine of the drawings comprises a rockshaft 7s, which is mounted in bearings 7e upon the side of the frame a2. (See Fig. l.) The rock-sha'f t 7c carries an arm 7a2, which is fixedly secured to said rock-shaft and which at its upper end 7e3 is engaged by a suitable spring 7a4, the lower end 705 of the arm 7a2 being in position to engage a pin 7u, projecting from the arm i of the rock-shaft 2 when the rock-shaft 7u shall be rocked against the tension of the spring 7t4, whereby as the rock-shaft 7c is rocked the lower end 755 of the arm 71:2 will engage the pin 7t'6, projecting from the arm t", moving the arm i* outwardly, and thus rocking the shaft i2 to raise the presser-foot E. In order to rock the shaft 7e, there is fixed to its rear end a le ver 75, which is immediately adjacent to the hand-wheel 7) and at its upper end has a suitable thumbpiece Las, which vis in position to be engaged by the operator by the thumb of the hand by which he grasps the hand-wheel D', and thus the hand-wheel b may be turned to raise the puneh-stoek C and the lever 7&7 depressed to elevate the presser-foot E at the saine time.

The work-plate D,which is preferably made of steel or cast-iron, is cut away, as shown at 75, adjacent the slot d, and in the recess thus formed is placed a plate of soft metal c7, preferably brass or other suitable metal, the plate L76 being secured in the recess (75, with one side forming one boundary of the slot d, by means of a rod C77, which passes through an aperture C78, (see Fig. 5,) and the upper end of said rod is provided with a threaded portion engaging a threaded aperture d in the plate (7U. The plate C may be circular or anyother suitable shape desired; but, as shown in Fig. 7 of the drawings, I prefer to form the plate d polygonal in outline, having a plurality of straight sides d10, whereby to accommodate a punch having more than a single punchingpoint, and whereby the surface against which the punch acts when it becomes worn maybe shift-ed by turning the plate d to thus bring a new surface under the punch.

By arranging the punching-plate so that it forms one side of the slot in the werk-bed I am enabled to bring the point at which the punch operates close to the point at which the work-feeding devices engage the material, thereby rendering it much easier for the machine to form the ornamentations on curved lines, the close approximation of the feeding devices and the punch rendering the mate IOO IIO

'a 'aimee i'i'al easy to be turned While working along a curved line.

'm represents a suitable guide or gage,which at its rear end is provided with a slot, (not shown,) through which passes a set-screw m', by means of whichl the gage m is adjustably secured to a lug m2, projecting from the side of the frame 0,2. (See Fig. 3.) At its forward end the gage m has a projecting finger m and a rounded boss m4 below said linger, the edge of the material being operated upon being positioned beneath the iinger m8 and against the boss m4. By loosening the set-screw m the gage fm may be positioned upon the workplate D at any suitable point relatively to the punch and presser-foot, and in order to adjust the height of the finger m3 above the upper 'surface of the work-plate D to accommodate the same to different thicknesses of material I have provided an adjusting-screw m5, which is tapped into a threaded bearing in the outer end of the gage m, the lower end of which bears against the upper su rface of the workplate D and by means of which the outer end of the gage m may be raised and lowered as desired. The adj listing-screw m5 is engaged by a lock-nut m6, whereby the screw lm5 is prevented from turning and the desired adjustment of the gage m retained.

In the operation of the machine power is supplied to the pulley b by a belt from a counter-shaft, which counter-shaft is controlled by a suitable clutch actuated by a foot-treadle, and in order to stop the revolution of the shaft B when the clutch of the counter-shaft is released I have provided a suitable brake n, carried by the upper end of a plungern, tted in sleeve n2, fixed to the base a, of the frame a2, said plunger Within the sleeve being acted upon by a spring n? (see dotted lines, Fig. 3) and connected at its lower end to a lever n4, which lever is connected by means not shown) with the clutch controlling treadle of the counter-shaft, the arrangement being such that when the operator depresses the treadle to start the machine the plunger n will be depressed to remove the brake n from contact withthe hand-wheel, but when the operator releases the treadle to throw o the clutch the spring n3 will immediately throw the brake in contact with the hand-wheel b' to stop the rotation of the shaft B.

In the operation of the present invention the piece of work to be perforated or punched is superimposed upon the bed-plate D, with its edge against the boss m4 of the gage 'm and engaged by the presser-foot and feed-dog. A rotation of the shaft B will now through the link c' impart a series of vertical reciprocations to the punch-stock C and punch c, causing it to punch a series of apertures in the fabric. At the same time the presser-foot and feed-dog will, by means of the mechanism hereinbefore described, alternately release and grip the material and impart thereto an intermittent feeding motion laterally beneath the punch c.

The machine, if desired, may be provided with a box w, which is pivoted by a screw w to the under side of the machine and arranged to swing in and out beneath and beyond the base, said box being provided with a suitable knob wz, whereby it may be turned upon its pivot. l g A Having described the construction and mode of operation of my invention, I claim as new and desire to protect by Letters Patent of the United Statesl. In a leather-punching machine, the combination with a feed-dog and a feed presserfoot, of slides carrying said dog and presserfoot,a forked lever pivotally connected to both slides, and means to actuate said lever to simultaneously reciprocate the slides, substantially as described.

2. In a leather-punching machine, the combination with a feed-dog and a feed presser; foot, of slides carrying said dog and presser foot,a forked lever pivotally connected to both slides, means to actuate said lever to reciprocate the slides, and an adjustable connection between said lever and its actuating means, substantially as described.

3. In a leather-punching machine, the combination with a punch-stock, of a collar surrounding said punch-stock, a screw-actuated wedge carried by the punch-stock and forming a rest or support for the lower end of the collar, spring-controlled devices acting upon the upperend of the collar and means connected with said collar to reciprocate the punch-stock, substantially as described.

4. In a leather-punching machine, the combination with a punch-stock and a powerdriven shaft and connections to reciprocate said punch-stock, of a yielding verticallymovable presser-foot, a hand-wheel on lthe power-shaft for turning said shaft to raise the punch-stock and a lever located adjacent to the hand wheel and connected to the presser-foot, whereby the presser-foot can be raised as the hand-wheel is turned to raise the punch-stock, substantially as described.

5. In a leather-punching machine, the combination with a punch-stock and means to vertically reciprocate it, of a feeding presser-foot arranged in front of the punch-stock, a horizontally reciprocating slide carrying said presser-foot, a feed-dog located beneath said presser-foot,a horizontally-reciprocating slide carrying said feed-dog, a forked lever pivotally connected with the slides of the presserfoot and feed-dog and means to actuate said forked lever, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

' CHARLES P. STANBON.

Vitnesses:

T. HART ANDERSON, A. E. WHYTE.

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